C0544 on 2015-2017 GMC Sierra: Steering Sensor Fault Causes and Fixes

What's Unique About the 2015-2017 Gmc SIERRA

The K2XX platform, which includes the 2015-2017 Sierra and its Chevrolet/Cadillac counterparts, is notorious for specific electrical issues that trigger C0544. The most prominent is a design flaw where sound-deadening insulation was often trapped under the main Body Control Module ground (G218) 🎬 Watch: How to locate and clean the G218 ground connection. during factory assembly. This creates high resistance and causes widespread communication errors that mimic a sensor failure. GM has issued multiple Technical Service Bulletins (TSBs), like PIT5405C and its successor 18-NA-161, directly addressing this ground issue as a root cause for C0544 and a host of other electrical gremlins.

Diagnostic Flowchart

Tap your situation to follow the diagnostic path that matches what you're seeing on this vehicle.

Symptoms You May Notice

• "Service StabiliTrak" or "Service Power Steering" message on the dashboard.
• Loss of power steering assist, which may be intermittent, often occurring during low-speed turns like parking.
• Steering wheel jerks or kicks back when turning.
• Flickering headlights and dashboard lights, sometimes in sync with turn signal use or braking.
• Widespread electrical issues like the radio/HVAC display going blank, engine stalling, or a no-start condition.
• Alarm sounding randomly or door locks cycling while driving or after shutdown.
• Symptoms appear more frequently in wet weather or when turning the wheel to the right, according to some owner reports.

Most Likely Causes

1. Poor Body Control Module (BCM) Ground at G218 🔴 High Probability → Shop Body Control Module A known factory assembly issue where dash insulation gets trapped under the ground terminal, preventing a solid connection. This is the primary cause cited in GM TSB PIT5405C and its successor, 18-NA-161, and confirmed in countless owner forums.
   How to confirm: Visually inspect the G218 ground stud, located under the driver's side dash, typically behind the A-pillar trim panel near the speaker. Look for black foam or rubber insulation material under the ground wire's eyelet. A YouTube video by user Dustin T shows the exact location and what the trapped material looks like.
   Typical fix: Disconnect the battery. Remove the 10mm nut from the G218 stud. Pull the terminal(s) off and use a utility knife to cut away the insulation from around the stud. Clean the contact surfaces of the terminal and body with a wire brush until shiny, then re-secure the nut tightly.
   Est. part cost: $0-$5
2. Chafed Wiring Harness 🟡 Medium Probability TSB #PIT5288E notes that the instrument panel wire harness can become chafed against a dash bracket, leading to various electrical faults and communication codes, including C0544.
   How to confirm: Inspect the wiring harness behind the left side of the instrument panel for any signs of rubbing, exposed wires, or damage. TSB #PIT5288H specifically notes the harness can be pinched between the left I/P mounting bracket and the body.
   Typical fix: Repair the damaged wires using appropriate connectors or solder and protect the harness from future chafing with anti-abrasion tape or plastic loom.
   Est. part cost: $5-$25
3. Failed Steering Angle Sensor ⚪ Low Probability → Shop Steering Angle Sensor While less common than the ground issue, the sensor itself can fail electronically or mechanically. It is often replaced unnecessarily when the G218 ground is the true culprit.
   How to confirm: After confirming grounds and wiring are good, use a scan tool to monitor the steering angle sensor's live data while turning the wheel. The reading should be smooth. If it jumps, freezes, or is unresponsive, the sensor has likely failed.
   Typical fix: Replace the steering angle sensor, which is located in the steering column. The new sensor MUST be calibrated using a professional-grade scan tool.
   Est. part cost: $80-$150

Rare But Worth Checking

• Power Steering Control Module (PSCM) Software Issue: → Shop Power Steering Control Module GM Recall #18289 was issued for 2015 models for temporary loss of power steering caused by a software issue that can be resolved with a dealer-installed reflash. Additionally, TSB #18-NA-161 (which supersedes PIT5405C) notes that a software glitch can cause the PSCM to hold C0544 as a current code even after the original fault is resolved, also requiring a reprogram.
• High Resistance in Battery Cables or Connections: → Shop Vehicle Battery TSB #PIT5405C and its successor 18-NA-161 detail several other potential causes, including loose/corroded battery terminals, a bad ground connection at the engine block, or a positive cable shorting on the starter heat shield. The TSB provides specific torque specs (7 Nm for battery terminals) and voltage drop test parameters.
• Incorrect Steering Angle Sensor Calibration: → Shop Steering Angle Sensor If the code appeared immediately after a wheel alignment, the sensor may have been improperly calibrated or not calibrated at all. A shop with a proper scan tool will need to perform the steering angle sensor learn procedure.

Diagnosis Steps

1. Read all Diagnostic Trouble Codes (DTCs) from all modules with a professional scan tool. A long list of 'U' (communication) codes strongly points to a ground issue.
2. CRITICAL FIRST STEP: Inspect, clean, and tighten the G218 ground connection. It is under the driver's side dash, near the A-pillar speaker. Disconnect the battery, remove the 10mm nut, cut away any trapped foam insulation, clean all metal surfaces to be shiny, and re-tighten securely. This resolves the majority of cases.
3. Check the battery and charging system to ensure proper voltage (above 12.4V). Perform a voltage drop test on the main battery cables as outlined in TSB 18-NA-161 if the ground fix doesn't work.
4. Inspect the main battery cable connections at the battery, fuse block, and engine block for tightness and corrosion. Per TSB PIT5405C, terminals should be torqued to 7 Nm (62 lb-in).
5. Inspect the instrument panel wiring harness for any signs of chafing or damage, as noted in TSB #PIT5288E.
6. Using a scan tool, monitor the live data from the steering angle sensor. Turn the steering wheel lock-to-lock. The degree reading should change smoothly and logically.
7. If the sensor data is erratic or absent and all wiring/grounds are confirmed good, replace the steering angle sensor.
8. After replacement or a wheel alignment, perform the Steering Angle Sensor calibration procedure using a compatible scan tool.

Parts You'll Likely Need

• Steering Angle Sensor (OEM #13590209) — This part is replaced only after confirming the common wiring and ground issues are not the cause. It provides the steering wheel position data to the vehicle's safety systems.
  Trusted brands: ACDelco, Duralast
  OEM price range: $110-$140
  Aftermarket price range: $80-$125

Related Codes That Often Appear With This One

• U0126 — Lost Communication With Steering Angle Sensor Module. This code directly points to a communication breakdown, often caused by the G218 ground or a wiring issue.
• U0415 — Invalid Data Received From Electronic Brake Control Module. The EBCM relies on steering angle data to operate StabiliTrak. If the data is corrupt (due to a bad ground) or missing, this code is set.
• C0710 — Steering Wheel Position Signal. This is another code related to the steering angle sensor signal, often appearing alongside C0544 and mentioned in TSB PIT5405C.
• U0073 — Control Module Communication Bus A Off. This is a general network code that can be triggered by the faulty G218 ground affecting the Body Control Module's ability to communicate.

Technical Service Bulletins (TSBs) & Recalls

• PIT5405C: Documents the poor BCM ground at G218, shorted battery cables, and loose connections as causes for C0544 and a wide array of other electrical issues.
• 18-NA-161: Supersedes older bulletins and provides a comprehensive diagnostic procedure for various electrical conditions, including the G218 ground, battery cable voltage drops, and the need for PSCM reprogramming for persistent codes.
• PIT5288E: Notes that a chafed instrument panel wire harness can cause C0544 and other communication codes.
• GM Recall #18289 / NHTSA 18V-586: Safety recall for 2015 models to reprogram the Power Steering Control Module to prevent temporary loss of steering assist.

Platform-Specific Known Issues

• G218 Ground Defect: The most significant issue for this platform is the factory defect where sound-deadening insulation gets caught under the BCM ground lug, causing high resistance and a multitude of electrical faults. This is detailed in TSB PIT5405C.
• PSCM Software Update (Recall #18289): A recall was issued for 2015 models for an issue where electric power steering assist could be lost momentarily and then suddenly return, especially during low-speed turns. The fix is a software update for the EPS module performed by a dealer.
• Persistent Current DTCs: TSB #18-NA-161 notes a software issue where the PSCM may fail to move a DTC like C0544 to 'history' after the fault is gone (e.g., after a battery change), requiring a module reprogram.

Mechanic-Grade Diagnostic Values

• Negative Battery Cable Voltage Drop (while cranking) — expected: Less than 200 mV. Failure: A reading above 200 mV indicates excessive resistance in the cable, requiring replacement.
• Positive Battery Cable Voltage Drop (battery to fuse block, while cranking) — expected: Less than 100 mV. Failure: A reading above 100 mV indicates excessive resistance in the cable, requiring replacement.
• Battery Cable Clamp Nut Torque — expected: 7 Nm (62 lb-in). Failure: Loose clamps can cause voltage fluctuations and widespread communication DTCs.
• CAN Bus Line Resistance at Sensor Connector — expected: 54 to 69 Ω. Failure: Resistance outside this range can indicate a problem with the CAN bus wiring or terminating resistors.
• Ground Circuit Voltage Drop (at component) — expected: Less than 0.1 V. Failure: A reading greater than 0.1V (or 0.3V in non-computer circuits) indicates high resistance in the ground path.

Hidden / Shadow Codes Worth Checking

• C0544-5A: Steering Wheel Angle Sensor Signal Plausibility Fault. This specific symptom byte indicates the data from the sensor is illogical or doesn't match other vehicle data. It often gets 'latched' in memory after an incorrect wheel alignment or calibration and may not clear with a standard tool. (see via A professional scan tool like the GM GDS2 or an advanced aftermarket tool capable of reading manufacturer-specific symptom bytes.)
• U0415-75: Invalid Data Received From Electronic Brake Control Module - In-Plant Detected. This often sets alongside C0544-5A and points to the same root cause of an incorrect alignment/calibration procedure causing a persistent, non-clearing fault. (see via A professional scan tool like the GM GDS2 or an advanced aftermarket tool.)

Scan Tool Commands That Help

• GM GDS2 (or equivalent Autel/Launch/Xtool): Steering Wheel Angle Sensor Learn / Calibration — This function is required after replacing the steering angle sensor, performing a wheel alignment, or replacing steering/suspension components. It zeroes the sensor's position when the wheels are straight ahead.
• GM GDS2 (or equivalent): Power Steering Control Module (PSCM) Programming — Required to clear persistent codes that won't erase after a fix, as described in TSBs like 18-NA-161 and PI0800B. This updates the module's software to fix glitches that can incorrectly hold a current DTC.

Wiring & Ground Locations

• G218 — Under the driver's side of the dashboard, on the metal body structure behind the A-pillar trim panel, often near the dash speaker.. This is the primary ground for the Body Control Module (BCM). High resistance here due to trapped insulation disrupts CAN bus communication, causing C0544 and a host of other electrical codes.
• Instrument Panel Harness Chafe Point — Behind the left side of the instrument panel, where the main harness can rub against a sharp metal dash mounting bracket near the parking brake pedal assembly.. Chafing can short communication wires (CAN bus), directly causing C0544 and other communication DTCs as noted in TSB PIT5288H.
• G103 — On the vehicle frame.. While not the primary cause, TSB 16-NA-161 notes that a poor connection at this ground can cause a no-start or anti-theft light, which are sometimes seen with the cluster of electrical issues related to C0544.

Real Owner Repair Stories

• YouTube user Tony Lester (2014 Chevrolet Silverado (platform mate)) — Stabilitrak warning, radio and AC shutting off, door locks cycling, steering wheel locking up during low-speed turns.
  ❌ Tried (didn't work) Initial research pointed to multiple expensive causes.
  ✅ What actually fixed it The G218 ground connection was loose due to sound-deadening material trapped under the terminal. The fix was to remove the 10mm nut, trim the material away, clean the contact, and re-secure the ground, which resolved all symptoms.
• YouTube user Dustin T, in video by another creator (2014 Silverado High Country (platform mate)) — Headlights and dash lights flickering, park assist disabled, power steering disabled, and various warning messages.
  ❌ Tried (didn't work) Tested battery and alternator, which were both fine.
  ✅ What actually fixed it Identified the G218 ground under the driver's side dash as the culprit. Sound deadening material was trapped under the ground nut, causing a poor connection. Cleaning the ground and re-tightening the nut corrected all issues.

When the Usual Fixes Don't Work

• While the G218 ground is the most common culprit, it is not the only cause. There are confirmed cases where cleaning the ground did not resolve the issue. In one instance involving a platform-mate Chevrolet Silverado, a user tried cleaning the ground without success. The final fix was replacing the steering angle sensor itself, followed by a successful calibration using an Xtool D8S scan tool, which cleared all codes and warnings. This highlights the importance of performing full diagnostics if the common G218 fix does not work.

OEM Part Supersession History

• 13590209 → No direct supersession found, this part number appears to be current. — N/A
  Heads up: This part requires programming and/or special setup procedures after installation. While it fits a wide range of GM trucks and SUVs from 2014-2024, always verify fitment with the vehicle's VIN as it is sometimes included with the entire steering column assembly.

Model Year Variations Within This Range

• 2015: Subject to GM Recall #18289 for a software issue that could cause a temporary loss and sudden return of power steering assist. The fix is a dealer-installed software update to the Power Steering Control Module.
• Vehicles built prior to June 2015: TSB 18-NA-161 specifically calls out inspecting the G218 ground on trucks built before this date, suggesting a potential process change at the factory around this time.